| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 109 |
| Registration plate issues | 64 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 51 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 29 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 28 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 27 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 25 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 25 |
| Front wheel bearings have excessive free play |2.3.5b| | 22 |
| Front Brake lever has inadequate reserve travel |3.1.3b| | 21 |
| Rear reflector on motorcycle missing |1.4.1| | 21 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 16 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 16 |
| Riders seat insecure |6.2.1a| | 15 |
| Steering headbearing has excessive free play |2.2.2| | 14 |
| Horn not working |1.7.3a| | 14 |
| Nearside Rear Direction indicator not working |1.5.1c| | 13 |
| Offside Rear Direction indicator not working |1.5.1c| | 12 |
| Rear Brake pedal has inadequate reserve travel |3.1.3b| | 11 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 11 |
| Nearside Front Direction indicator not working |1.5.1c| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Throttle operating incorrectly |6.2.1f| | 10 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 10 |
| Nearside Front Direction indicators not working |1.5.1c| | 8 |
| Stop lamp remains on when the brake is released |1.3.1e| | 8 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 8 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 8 |
| Offside Rear Direction indicators not working |1.5.1c| | 8 |
| Nearside Rear Direction indicators not working |1.5.1c| | 8 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 8 |
| Brake lever has inadequate reserve travel |3.1.3b| | 7 |
| Headlamp aim not tested |1.6| | 7 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Offside Front Direction indicator not working |1.5.1c| | 7 |
| Headlamp insecure |1.2.3b| | 7 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 6 |
| Front Front wheel bearings have excessive free play |2.3.5b| | 6 |
| Direction indicators not working |1.5.1c| | 6 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Registration plate lamp issues | 6 |
| Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Rear Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 5 |
| Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Offside Front Direction indicators not working |1.5.1c| | 5 |
| Handlebar mounting clamp loose |2.1.1a| | 5 |
| Rear Direction indicators not working |1.5.1c| | 5 |
| Rear Direction indicator not working |1.5.1c| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Indicator tell tale not functioning |1.5.2| | 5 |
| Front Position lamp not working (4.2.1 (a)) | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 4 |
| Headlamp main beam affected by the operation of another lamp |1.2.2c| | 4 |
| Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 4 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 4 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 4 |
| Direction indicator not working |1.5.1c| | 4 |
| Brake pedal cannot be released smoothly |3.1.3d| | 4 |
| Headlamp dipped beam affected by the operation of another lamp |1.2.2c| | 4 |
| Stop lamp affected by the operation of another lamp |1.3.2| | 4 |
| Front Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 4 |
| Brake pedal has inadequate reserve travel |3.1.3b| | 4 |
| Horn not loud enough to be heard by another road user |1.7.3a| | 4 |
| Rear position lamp adversely affected by the operation of another lamp |1.1.3b| | 4 |
| Stop lamp remains on when the brakes are released | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Roller brake test indicates brake effort fall disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 3 |
| Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Front Steering headbearing has excessive free play |2.2.2| | 3 |
| Rear wheel has a loose wheel nut|s| |4.2.3a| | 3 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Handlebar mounting clamp bolt loose |2.1.1a| | 3 |
| Rear position lamp incorrect colour |1.1.2b| | 3 |
| Front Direction indicator incorrect colour |1.5.1b| | 3 |
| Rear wheel spindle loose |2.4.A.2b| | 3 |
| Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 3 |
| Rear wheel insecure |4.2.3b| | 3 |
| Rear Rear wheel spindle securing nut|s| loose |2.4.A.2b| | 3 |
| Offside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Front Stop lamp remains on when the brake is released |1.3.1e| | 3 |
| Steering headbearing has excessive wear or free play |2.2.2 |f| |i|| | 3 |
| Nearside Rear Direction indicator incorrect colour |1.5.1b| | 3 |
| Centre Front Front wheel bearings have excessive free play |2.3.5b| | 3 |
| Headlamp not working on main beam (4.1.1 (a) (ii)) | 3 |
| Rear reflector missing (4.8.2 (a) (ii)) | 3 |
| Front Brake lever has insufficient reserve travel (1.1.2 (a)) | 3 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Stop lamp not working (4.3.1 (a) (ii)) | 3 |
| Horn not working (7.7 (a)) | 3 |
| Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Steering headbearing has excessive wear or free play (2.2.2 (f) (i)) | 3 |